This study aimed to compare numerical and laboratory methods for analyzing the mechanical performance of high-strength reinforced concrete beams. It also aimed to identify the factors that can be used to Improving the mechanical performance of high-strength reinforced concrete beams by incorporating glass fiber reinforced polymers (GFRP). Three beam specimens (B01, B02, and B03) with identical dimensions but different reinforcing materials—steel, hybrid (steel + GFRP), and all-GFRP—were analyzed experimentally and numerically using Abacus and MATLAB. The stiffness, displacement, stress, strain distribution, and energy absorption under flexural loads were determined and evaluated. The results indicated that the B01 beam, reinforced entirely with steel, exhibited the highest initial stiffness and lowest deflection, making it suitable for applications requiring high stiffness. The B02 beam, reinforced with hybrid bars, exhibited increased ductility and higher strain, indicating its suitability for applications requiring deformability. The B03 beam, reinforced solely with glass fibers, achieved a balanced performance between stiffness and ductility. Statistical correlation analysis confirmed a strong agreement between the experimental and numerical data (correlation coefficients > 0.8), confirming the accuracy of the model. Beam B01 proved to be best suited for applications requiring high stiffness, recording the lowest strain value (0.022) and the highest energy efficiency under load (490 and 450), demonstrating its high resistance to deformation. In contrast, beam B02 exhibited a higher strain (0.055) and lower energy efficiency (200 and 250), indicating high ductility and reduced efficiency due to the quality of the reinforcement. Beam B03 recorded a medium strain (0.045), reflecting its greater susceptibility to deformation compared to B01, but maintained a higher efficiency than B02. Numerical methods are faster and less expensive, and allow for multiple scenarios to be flexibly analyzed................. Keywords: ............Concrete beams, stresses, loads, strain, abacus, numerical methods, laboratory methods and DFRP.